/**
* @brief    CRC校验
* @file     CRC.c
* @author   何锡斌
* @email    2537274979@qq.com
* @date     2024/02/18
* @version  V1_0_0
* @par      实现功能：
* - CRC校验(查表法)/分段校验(查表法)/直接计算
* - CRC8/CRC8-MAXIM
* - CRC16-MODBUS
* - CRC32
* @par      注意事项：
* - 每种CRC校验对数据块大小的常用适用范围：CRC8(几个到几十字节)、CRC16(几十个到几百字节)、CRC32(几百到几兆字节)
* @par      修改日志：
* <table>
* <tr><th>日期          <th>版本        <th>作者    <th>更新内容        </tr>
* <tr><td>2024/02/18    <td>V1_0_0      <td>何锡斌  <td>初版发布；      </tr>
* </table>
*/
#include "CRC.h"



#if CRC_TABLE_METHOD


#if CRC_TABLE_PRINT_FLAG
/*通用类型表格打印*/
#include "stdio.h"													/* 需要打印表格时printf使用 */
#define Printf_CRCTable(table)										\
{																	\
	for(unsigned short tempIndex = 0; tempIndex < 256; tempIndex++)	\
	{																\
		if(0 == tempIndex%16)printf("\n");							\
																	\
		printf("0x%x, ", table[tempIndex]);							\
	}																\
	printf("\n");													\
}
#endif /*CRC_TABLE_PRINT_FLAG*/


#if USE_CRC8
static unsigned char CRC8Table[256] = {
	0x0,  0x7,  0xe,  0x9, 0x1c, 0x1b,  0x12, 0x15, 0x38, 0x3f, 0x36, 0x31, 0x24, 0x23, 0x2a, 0x2d, 
	0x70, 0x77, 0x7e, 0x79, 0x6c, 0x6b, 0x62, 0x65, 0x48, 0x4f, 0x46, 0x41, 0x54, 0x53, 0x5a, 0x5d, 
	0xe0, 0xe7, 0xee, 0xe9, 0xfc, 0xfb, 0xf2, 0xf5, 0xd8, 0xdf, 0xd6, 0xd1, 0xc4, 0xc3, 0xca, 0xcd, 
	0x90, 0x97, 0x9e, 0x99, 0x8c, 0x8b, 0x82, 0x85, 0xa8, 0xaf, 0xa6, 0xa1, 0xb4, 0xb3, 0xba, 0xbd, 
	0xc7, 0xc0, 0xc9, 0xce, 0xdb, 0xdc, 0xd5, 0xd2, 0xff, 0xf8, 0xf1, 0xf6, 0xe3, 0xe4, 0xed, 0xea, 
	0xb7, 0xb0, 0xb9, 0xbe, 0xab, 0xac, 0xa5, 0xa2, 0x8f, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9d, 0x9a, 
	0x27, 0x20, 0x29, 0x2e, 0x3b, 0x3c, 0x35, 0x32, 0x1f, 0x18, 0x11, 0x16, 0x3,  0x4,  0xd,  0xa, 
	0x57, 0x50, 0x59, 0x5e, 0x4b, 0x4c, 0x45, 0x42, 0x6f, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7d, 0x7a, 
	0x89, 0x8e, 0x87, 0x80, 0x95, 0x92, 0x9b, 0x9c, 0xb1, 0xb6, 0xbf, 0xb8, 0xad, 0xaa, 0xa3, 0xa4, 
	0xf9, 0xfe, 0xf7, 0xf0, 0xe5, 0xe2, 0xeb, 0xec, 0xc1, 0xc6, 0xcf, 0xc8, 0xdd, 0xda, 0xd3, 0xd4, 
	0x69, 0x6e, 0x67, 0x60, 0x75, 0x72, 0x7b, 0x7c, 0x51, 0x56, 0x5f, 0x58, 0x4d, 0x4a, 0x43, 0x44, 
	0x19, 0x1e, 0x17, 0x10, 0x5,  0x2,  0xb,  0xc,  0x21, 0x26, 0x2f, 0x28, 0x3d, 0x3a, 0x33, 0x34, 
	0x4e, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5c, 0x5b, 0x76, 0x71, 0x78, 0x7f, 0x6a, 0x6d, 0x64, 0x63, 
	0x3e, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2c, 0x2b, 0x6,  0x1,  0x8,  0xf,  0x1a, 0x1d, 0x14, 0x13, 
	0xae, 0xa9, 0xa0, 0xa7, 0xb2, 0xb5, 0xbc, 0xbb, 0x96, 0x91, 0x98, 0x9f, 0x8a, 0x8d, 0x84, 0x83, 
	0xde, 0xd9, 0xd0, 0xd7, 0xc2, 0xc5, 0xcc, 0xcb, 0xe6, 0xe1, 0xe8, 0xef, 0xfa, 0xfd, 0xf4, 0xf3,
};
#if CRC_TABLE_PRINT_FLAG
/*CRC8表格初始化(用于制作上述表格)*/
void CRC8TableInit(void)
{
	unsigned short tempIndex;							/* 数组下标 */
	unsigned char i;									/* 用于遍历8个bit */
	unsigned char tempTableVal;							/* 表格的值 */
	
	for(tempIndex = 0; tempIndex < 256; tempIndex++)
	{
		tempTableVal = tempIndex;
		for(i = 0; i < 8; i++)
		{
			if((tempTableVal & 0x80) != 0)				/* 判断移出位 */
			{
				tempTableVal <<= 1;
				tempTableVal ^= 0x07;					/* 异或多项式 */
			}
			else
			{
				tempTableVal <<= 1;
			}
		}
		
		CRC8Table[tempIndex] = tempTableVal;			/* 更新表值 */
	}
		
	Printf_CRCTable(CRC8Table);							/* 打印表格 */
}
#endif /*CRC_TABLE_PRINT_FLAG*/
/*CRC8校验(表格法)*/
unsigned char CRC8_Table(unsigned char* pData, unsigned int dataLen)
{
	unsigned char tempCRCCode;
	tempCRCCode = 0x00;									/* 初始化CRC校验码 */
	
	for(unsigned int i = 0; i < dataLen; i++)
	{
		tempCRCCode = CRC8Table[tempCRCCode ^ pData[i]];
	}

	return tempCRCCode;									/* 返回CRC校验码 */
}
/*CRC8分段校验校验码初始化(表格法)*/
void CRC8_Segmented_CodeInit_Table(unsigned char* crcCode)
{
	*crcCode = 0x00;									/* 初始化CRC校验码 */
}
/*CRC8分段校验(表格法)*/
unsigned char CRC8_Segmented_Table(unsigned char crcCode, unsigned char* pData, unsigned int dataLen)
{
	for(unsigned int i = 0; i < dataLen; i++)
	{
		crcCode = CRC8Table[crcCode ^ pData[i]];
	}

	return crcCode;										/* 返回CRC校验码 */
}
#endif /*USE_CRC8*/



#if USE_CRC8MAXIM
static unsigned char CRC8MAXIMTable[256] = {
	0x0,  0x5e, 0xbc, 0xe2, 0x61, 0x3f, 0xdd, 0x83, 0xc2, 0x9c, 0x7e, 0x20, 0xa3, 0xfd, 0x1f, 0x41, 
	0x9d, 0xc3, 0x21, 0x7f, 0xfc, 0xa2, 0x40, 0x1e, 0x5f, 0x1,  0xe3, 0xbd, 0x3e, 0x60, 0x82, 0xdc, 
	0x23, 0x7d, 0x9f, 0xc1, 0x42, 0x1c, 0xfe, 0xa0, 0xe1, 0xbf, 0x5d, 0x3,  0x80, 0xde, 0x3c, 0x62, 
	0xbe, 0xe0, 0x2,  0x5c, 0xdf, 0x81, 0x63, 0x3d, 0x7c, 0x22, 0xc0, 0x9e, 0x1d, 0x43, 0xa1, 0xff, 
	0x46, 0x18, 0xfa, 0xa4, 0x27, 0x79, 0x9b, 0xc5, 0x84, 0xda, 0x38, 0x66, 0xe5, 0xbb, 0x59, 0x7, 
	0xdb, 0x85, 0x67, 0x39, 0xba, 0xe4, 0x6,  0x58, 0x19, 0x47, 0xa5, 0xfb, 0x78, 0x26, 0xc4, 0x9a, 
	0x65, 0x3b, 0xd9, 0x87, 0x4,  0x5a, 0xb8, 0xe6, 0xa7, 0xf9, 0x1b, 0x45, 0xc6, 0x98, 0x7a, 0x24, 
	0xf8, 0xa6, 0x44, 0x1a, 0x99, 0xc7, 0x25, 0x7b, 0x3a, 0x64, 0x86, 0xd8, 0x5b, 0x5,  0xe7, 0xb9, 
	0x8c, 0xd2, 0x30, 0x6e, 0xed, 0xb3, 0x51, 0xf,  0x4e, 0x10, 0xf2, 0xac, 0x2f, 0x71, 0x93, 0xcd, 
	0x11, 0x4f, 0xad, 0xf3, 0x70, 0x2e, 0xcc, 0x92, 0xd3, 0x8d, 0x6f, 0x31, 0xb2, 0xec, 0xe,  0x50, 
	0xaf, 0xf1, 0x13, 0x4d, 0xce, 0x90, 0x72, 0x2c, 0x6d, 0x33, 0xd1, 0x8f, 0xc,  0x52, 0xb0, 0xee, 
	0x32, 0x6c, 0x8e, 0xd0, 0x53, 0xd,  0xef, 0xb1, 0xf0, 0xae, 0x4c, 0x12, 0x91, 0xcf, 0x2d, 0x73, 
	0xca, 0x94, 0x76, 0x28, 0xab, 0xf5, 0x17, 0x49, 0x8,  0x56, 0xb4, 0xea, 0x69, 0x37, 0xd5, 0x8b, 
	0x57, 0x9,  0xeb, 0xb5, 0x36, 0x68, 0x8a, 0xd4, 0x95, 0xcb, 0x29, 0x77, 0xf4, 0xaa, 0x48, 0x16, 
	0xe9, 0xb7, 0x55, 0xb,  0x88, 0xd6, 0x34, 0x6a, 0x2b, 0x75, 0x97, 0xc9, 0x4a, 0x14, 0xf6, 0xa8, 
	0x74, 0x2a, 0xc8, 0x96, 0x15, 0x4b, 0xa9, 0xf7, 0xb6, 0xe8, 0xa,  0x54, 0xd7, 0x89, 0x6b, 0x35,
};
#if CRC_TABLE_PRINT_FLAG
/*CRC8MAXIM表格初始化(用于制作上述表格)*/
void CRC8MAXIMTableInit(void)
{
	unsigned short tempIndex;							/* 数组下标 */
	unsigned char i;									/* 用于遍历8个bit */
	unsigned char tempTableVal;							/* 表格的值 */
	
	for(tempIndex = 0; tempIndex < 256; tempIndex++)
	{
		tempTableVal = tempIndex;
		for(i = 0; i < 8; i++)
		{
			if((tempTableVal & 0x01) != 0)				/* 判断移出位 */
			{
				tempTableVal >>= 1;
				tempTableVal ^= 0x8C;					/* 异或多项式 0x8C = 0x31反转 */
			}
			else
			{
				tempTableVal >>= 1;
			}
		}
		
		CRC8MAXIMTable[tempIndex] = tempTableVal;		/* 更新表值 */
	}
		
	Printf_CRCTable(CRC8MAXIMTable);					/* 打印表格 */
}
#endif /*CRC_TABLE_PRINT_FLAG*/
/*CRC8MAXIM校验(表格法)*/
unsigned char CRC8_MAXIM_Table(unsigned char* pData, unsigned int dataLen)
{
	unsigned char tempCRCCode;
	tempCRCCode = 0x00;									/* 初始化CRC校验码 */
	
	for(unsigned int i = 0; i < dataLen; i++)
	{
		tempCRCCode = CRC8MAXIMTable[tempCRCCode ^ pData[i]];
	}

	return tempCRCCode;									/* 返回CRC校验码 */
}
/*CRC8MAXIM分段校验校验码初始化(表格法)*/
void CRC8_MAXIM_Segmented_CodeInit_Table(unsigned char* crcCode)
{
	*crcCode = 0x00;									/* 初始化CRC校验码 */
}
/*CRC8MAXIM分段校验(表格法)*/
unsigned char CRC8_MAXIM_Segmented_Table(unsigned char crcCode, unsigned char* pData, unsigned int dataLen)
{
	for(unsigned int i = 0; i < dataLen; i++)
	{
		crcCode = CRC8MAXIMTable[crcCode ^ pData[i]];
	}

	return crcCode;										/* 返回CRC校验码 */
}
#endif /*USE_CRC8MAXIM*/



#if USE_CRC16MODBUS
static unsigned short CRC16ModbusTable[256] = {
	0x0,    0xc0c1, 0xc181, 0x140,  0xc301, 0x3c0,  0x280,  0xc241, 0xc601, 0x6c0,  0x780,  0xc741, 0x500,  0xc5c1, 0xc481, 0x440, 
	0xcc01, 0xcc0,  0xd80,  0xcd41, 0xf00,  0xcfc1, 0xce81, 0xe40,  0xa00,  0xcac1, 0xcb81, 0xb40,  0xc901, 0x9c0,  0x880,  0xc841, 
	0xd801, 0x18c0, 0x1980, 0xd941, 0x1b00, 0xdbc1, 0xda81, 0x1a40, 0x1e00, 0xdec1, 0xdf81, 0x1f40, 0xdd01, 0x1dc0, 0x1c80, 0xdc41, 
	0x1400, 0xd4c1, 0xd581, 0x1540, 0xd701, 0x17c0, 0x1680, 0xd641, 0xd201, 0x12c0, 0x1380, 0xd341, 0x1100, 0xd1c1, 0xd081, 0x1040, 
	0xf001, 0x30c0, 0x3180, 0xf141, 0x3300, 0xf3c1, 0xf281, 0x3240, 0x3600, 0xf6c1, 0xf781, 0x3740, 0xf501, 0x35c0, 0x3480, 0xf441, 
	0x3c00, 0xfcc1, 0xfd81, 0x3d40, 0xff01, 0x3fc0, 0x3e80, 0xfe41, 0xfa01, 0x3ac0, 0x3b80, 0xfb41, 0x3900, 0xf9c1, 0xf881, 0x3840, 
	0x2800, 0xe8c1, 0xe981, 0x2940, 0xeb01, 0x2bc0, 0x2a80, 0xea41, 0xee01, 0x2ec0, 0x2f80, 0xef41, 0x2d00, 0xedc1, 0xec81, 0x2c40, 
	0xe401, 0x24c0, 0x2580, 0xe541, 0x2700, 0xe7c1, 0xe681, 0x2640, 0x2200, 0xe2c1, 0xe381, 0x2340, 0xe101, 0x21c0, 0x2080, 0xe041, 
	0xa001, 0x60c0, 0x6180, 0xa141, 0x6300, 0xa3c1, 0xa281, 0x6240, 0x6600, 0xa6c1, 0xa781, 0x6740, 0xa501, 0x65c0, 0x6480, 0xa441, 
	0x6c00, 0xacc1, 0xad81, 0x6d40, 0xaf01, 0x6fc0, 0x6e80, 0xae41, 0xaa01, 0x6ac0, 0x6b80, 0xab41, 0x6900, 0xa9c1, 0xa881, 0x6840, 
	0x7800, 0xb8c1, 0xb981, 0x7940, 0xbb01, 0x7bc0, 0x7a80, 0xba41, 0xbe01, 0x7ec0, 0x7f80, 0xbf41, 0x7d00, 0xbdc1, 0xbc81, 0x7c40, 
	0xb401, 0x74c0, 0x7580, 0xb541, 0x7700, 0xb7c1, 0xb681, 0x7640, 0x7200, 0xb2c1, 0xb381, 0x7340, 0xb101, 0x71c0, 0x7080, 0xb041, 
	0x5000, 0x90c1, 0x9181, 0x5140, 0x9301, 0x53c0, 0x5280, 0x9241, 0x9601, 0x56c0, 0x5780, 0x9741, 0x5500, 0x95c1, 0x9481, 0x5440, 
	0x9c01, 0x5cc0, 0x5d80, 0x9d41, 0x5f00, 0x9fc1, 0x9e81, 0x5e40, 0x5a00, 0x9ac1, 0x9b81, 0x5b40, 0x9901, 0x59c0, 0x5880, 0x9841, 
	0x8801, 0x48c0, 0x4980, 0x8941, 0x4b00, 0x8bc1, 0x8a81, 0x4a40, 0x4e00, 0x8ec1, 0x8f81, 0x4f40, 0x8d01, 0x4dc0, 0x4c80, 0x8c41, 
	0x4400, 0x84c1, 0x8581, 0x4540, 0x8701, 0x47c0, 0x4680, 0x8641, 0x8201, 0x42c0, 0x4380, 0x8341, 0x4100, 0x81c1, 0x8081, 0x4040,
};
#if CRC_TABLE_PRINT_FLAG
/*CRC16Modbus表格初始化(用于制作上述表格)*/
void CRC16ModbusTableInit(void)
{
	unsigned short tempIndex;							/* 数组下标 */
	unsigned char i;									/* 用于遍历16个bit */
	unsigned short tempTableVal;						/* 表格的值 */
	
	for(tempIndex = 0; tempIndex < 256; tempIndex++)
	{
		tempTableVal = tempIndex;
		for(i = 0; i < 8; i++)
		{
			if((tempTableVal & 0x0001) != 0)			/* 判断移出位 */
			{
				tempTableVal >>= 1;
				tempTableVal ^= 0xA001;					/* 异或多项式 0xA001 = 0x8005的反转 */
			}
			else
			{
				tempTableVal >>= 1;
			}
		}
		CRC16ModbusTable[tempIndex] = tempTableVal;		/* 更新表值 */
	}
		
	Printf_CRCTable(CRC16ModbusTable);					/* 打印表格 */
}
#endif /*CRC_TABLE_PRINT_FLAG*/
/*CRC16Modbus校验(表格法)*/
unsigned short CRC16_Modbus_Table(unsigned char* pData, unsigned int dataLen)
{
	unsigned short tempCRCCode;
	tempCRCCode = 0xFFFF;								/* 初始化CRC校验码 */
	
	for(unsigned int i = 0; i < dataLen; i++)
	{
		tempCRCCode = (tempCRCCode >> 8)^(CRC16ModbusTable[(tempCRCCode ^ pData[i])&0xFF]);
	}

	return tempCRCCode;									/* 返回CRC校验码 */
}
/*CRC16Modbus分段校验校验码初始化(表格法)*/
void CRC16_Modbus_Segmented_CodeInit_Table(unsigned short* crcCode)
{
	*crcCode = 0xFFFF;									/* 初始化CRC校验码 */
}
/*CRC16Modbus分段校验(表格法)*/
unsigned short CRC16_Modbus_Segmented_Table(unsigned short crcCode, unsigned char* pData, unsigned short dataLen)
{
	for(unsigned int i = 0; i < dataLen; i++)
	{
		crcCode = (crcCode >> 8)^(CRC16ModbusTable[(crcCode ^ pData[i])&0xFF]);
	}

	return crcCode;										/* 返回CRC校验码 */
}
#endif /*USE_CRC16MODBUS*/



#if USE_CRC32
static unsigned int CRC32Table[256] = {
	0x0,        0x77073096, 0xee0e612c, 0x990951ba, 0x76dc419,  0x706af48f, 0xe963a535, 0x9e6495a3, 0xedb8832,  0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x9b64c2b,  0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 
	0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, 
	0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 
	0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 
	0x76dc4190, 0x1db7106,  0x98d220bc, 0xefd5102a, 0x71b18589, 0x6b6b51f,  0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0xf00f934,  0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x86d3d2d,  0x91646c97, 0xe6635c01, 
	0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, 
	0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 
	0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 
	0xedb88320, 0x9abfb3b6, 0x3b6e20c,  0x74b1d29a, 0xead54739, 0x9dd277af, 0x4db2615,  0x73dc1683, 0xe3630b12, 0x94643b84, 0xd6d6a3e,  0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0xa00ae27,  0x7d079eb1, 
	0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 
	0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, 
	0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, 
	0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x26d930a,  0x9c0906a9, 0xeb0e363f, 0x72076785, 0x5005713,  0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0xcb61b38,  0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0xbdbdf21, 
	0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 
	0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, 
	0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d, 
};
#if CRC_TABLE_PRINT_FLAG
/*CRC32文件校验表格初始化(用于制作上述表格)*/
void CRC32TableInit(void)
{
	unsigned short tempIndex;							/* 数组下标 */
	unsigned char i;									/* 用于遍历8个bit */
	unsigned int tempTableVal;							/* 表格的值 */

	for(tempIndex = 0; tempIndex < 256; tempIndex++)
	{
		tempTableVal = tempIndex;
		for(i = 0; i < 8; i++)
		{
			if((tempTableVal & 0x00000001) != 0)		/* 判断移出位 */
			{
				tempTableVal >>= 1;
				tempTableVal ^= 0xEDB88320;				/* 异或多项式  0xEDB88320 = 0x04C11DB7的反转 */
			}
			else
			{
				tempTableVal >>= 1;
			}
		}
		CRC32Table[tempIndex] = tempTableVal;			/* 更新表值 */
	}
	
	Printf_CRCTable(CRC32Table);						/* 打印表格 */
}
#endif /*CRC_TABLE_PRINT_FLAG*/
/*CRC32文件校验(表格法)*/
unsigned int CRC32_Table(unsigned char* pData, unsigned int dataLen)
{
	unsigned int tempCRCCode;
	tempCRCCode = 0xFFFFFFFF;							/* 初始化CRC校验码 */
	
	for(unsigned int i = 0; i < dataLen; i++)
	{
		tempCRCCode = (tempCRCCode >> 8)^(CRC32Table[(tempCRCCode ^ pData[i])&0xFF]);
	}

	return (tempCRCCode);								/* 返回CRC校验码 */
}
/*CRC32文件分段校验校验码初始化(表格法)*/
void CRC32_Segmented_CodeInit_Table(unsigned int* crcCode)
{
	*crcCode = 0xFFFFFFFF;								/* 初始化CRC校验码 */
}
/*CRC32文件分段校验(表格法)*/
unsigned int CRC32_Segmented_Table(unsigned int crcCode, unsigned char* data, unsigned int dataLen)
{
	for(unsigned int i = 0; i < dataLen; i++)
	{
        crcCode = (crcCode >> 8)^(CRC32Table[(crcCode ^ data[i])&0xFF]);
	}

	return crcCode;										/* 返回CRC校验码 */
}
#endif /*USE_CRC32*/
#endif /*CRC_TABLE_METHOD*/



#if CRC_MATH_METHOD
#if USE_CRC8
/**
* @brief		CRC8校验
* @param[in]	data			数据头指针
* @param[in]	dataLen		数据长度
* @return		8位CRC校验码
* - 
* @note
* - 多项式公式：x8 + x2 + x + 1
* - 多项式：0x07
* - 初始值：0x00
* - 结果异或值：0x00
* - 输入值反转：false
* - 输出值反转：false
* @par			示例:
* @code
* 
* @endcode
*/
unsigned char CRC8(unsigned char* data, unsigned short dataLen)
{
	unsigned char tempCRCCode;
	unsigned char j;
	unsigned short i;
	tempCRCCode = 0x00;						/* 初始化CRC校验码 */
	
	for(i = 0; i < dataLen; i++)
	{
		tempCRCCode ^= data[i];
		for(j = 0; j < 8; j++)
		{
			if((tempCRCCode & 0x80) != 0)
			{
				tempCRCCode <<= 1;
				tempCRCCode ^= 0x07;
			}
			else
			{
				tempCRCCode <<= 1;
			}
		}
	}

	return tempCRCCode;						/* 返回CRC校验码 */
}
#endif /*USE_CRC8*/



#if USE_CRC8MAXIM
/**
* @brief		CRC8检验/MAXIM
* @param[in]	data			数据头指针
* @param[in]	dataLen		数据长度
* @return		8位CRC校验码
* - 
* @note
* - 多项式公式：x8 + x5 + x4 + 1
* - 多项式：0x31
* - 初始值：0x00
* - 结果异或值：0x00
* - 输入值反转：ture
* - 输出值反转：ture
* @par			示例:
* @code
* 
* @endcode
*/
unsigned char CRC8_MAXIM(unsigned char* data, unsigned short dataLen)
{
	unsigned char tempCRCCode;
	unsigned char j;
	unsigned short i;
	tempCRCCode = 0x00;						/* 初始化CRC校验码 */
	
	for(i = 0; i < dataLen; i++)
	{
		tempCRCCode ^= data[i];
		for(j = 0; j < 8; j++)
		{
			if((tempCRCCode & 0x01) != 0)
			{
				tempCRCCode >>= 1;
				tempCRCCode ^= 0x8C;			/* 0x8C = 0x31反转 */
			}
			else
			{
				tempCRCCode >>= 1;
			}
		}
	}

	return tempCRCCode;						/* 返回CRC校验码 */
}
#endif /*USE_CRC8MAXIM*/



#if USE_CRC16MODBUS
/**
* @brief		CRC16校验/Modbus标准
* @param[in]	data			数据头指针
* @param[in]	dataLen		数据长度
* @return		16位CRC校验码
* - 
* @note
* - 多项式公式：x16 + x15 + x2 + 1
* - 多项式：0x8005
* - 初始值：0xFFFF
* - 结果异或值：0x0000
* - 输入值反转：true
* - 输出值反转：true
* @par			示例:
* @code
* 
* @endcode
*/
unsigned short CRC16_Modbus(unsigned char* data, unsigned short dataLen)
{
	unsigned short tempCRCCode;
	unsigned char j;
	unsigned short i;
	tempCRCCode = 0xFFFF;						/* 初始化CRC校验码 */
	
	for(i = 0; i < dataLen; i++)
	{
		tempCRCCode ^= data[i];
		for(j = 0; j < 8; j++)
		{
			if((tempCRCCode & 0x0001) != 0)
			{
				tempCRCCode >>= 1;
				tempCRCCode ^= 0xA001;			/* 0xA001 = 0x8005反转 */
			}
			else
			{
				tempCRCCode >>= 1;
			}
		}
	}

	return tempCRCCode;						/* 返回CRC校验码 */
}
#endif /*USE_CRC16MODBUS*/
#endif /*CRC_MATH_METHOD*/



/*使用例子*/
// void CRC_Test(void)
// {
// 	unsigned char data[3] = {0xA1, 0x11, 0xCD};
// 	unsigned short temp_crc = 0x0000;
// 	unsigned char crc_array[5];
	
// 	temp_crc = CRC_16(data, 3);		//要校验的数据
	
// 	crc_array[0] = data[0];
// 	crc_array[1] = data[1];
// 	crc_array[2] = data[2];
// 	crc_array[3] = temp_crc&0xff;
// 	crc_array[4] = (temp_crc>>8)&0xff;
	
// 	temp_crc = CRC_16(crc_array , 5);

// 	if(temp_crc == 0x0000)
// 	{
// 		temp_crc = 0x6666;
// 	}
// }
